- Fixed FS#3159 - SSL key and cert for *.domain.com doesnt show in SSL tab.

- Make sure tar backups are not deleted because of a return value of 1; tar can return 1 because of harmless warnings but still produces valid backups.

- Fixed "PHP Notice:  Undefined variable: rbl_list in /tmp/ispconfig-3.0.5/install/dist/lib/fedora.lib.php on line 173"
- Redirect Apache/nginx/PHP-FPM/BIND restart errors to STDOUT.

- Added rewrite rule checks to nginx plugin.

- Added "Rewrite Rules" field to the "Redirect" tab so that customers can set rewrite rules themselves on nginx.

- Display/email reason for service restart/reload failure (if init script doesn't suppress error messages).

- Fixed: web folder protection needs to be removed on ftp-user insert and update due to directory creation

- Admins can now choose to be notified by email about debug, warning or error messages in the server process.

- Improved recognition of when a service (Apache, nginx, etc.) was really restarted/reloaded successfully. Checking port 80 is not enough because nginx reloads silently, ignoring faulty configuration files, but returns a value > 0. If we don't check the return value, nginx will refuse to start when someone issues a restart the next time.

- cron_daily.php: "quota ok" messages are now also sent if quota is set to unlimited; before, when a quota warning was sent and the quota was then set to unlimited, no "quota ok" message was sent because of SQL query that looked for records where quota > 0.

  - send quota notifications each X days instead of each day
  - send notification when quota is ok again
  - cleaned up mail sending code